#include"stdio.h"
main()
{
int num,m=0,three=1,five=2,seven=4;
printf("please input a number:");
scanf("%d",&num);
if(num%3==0) m+=three;
if(num%5==0) m+=five;
if(num%7==0) m+=seven;
if(m==7)printf(" this number could exact division all");
if(m==6)printf(" this number could exact division 5 and 7" );
if(m==5)printf(" this number could exact division 3 and 7" );
if(m==3)printf(" this number could exact division 3 and 5" );
if(m==4)printf(" this number could exact division 7");
if(m==2)printf(" this number could exact division 5");
if(m==1)printf(" this number could exact division 1");
if(m==0)printf(" this number could exact division none");